🔌 Plug in confidence, test with precision!
The Martindale CP501 is the UK’s best-selling 240V socket tester, trusted by over 2 million users for fast, reliable detection of 28 wiring faults. Featuring three bright LEDs with intuitive fault codes and a tough, ergonomic design, it ensures electricians and homeowners can verify socket safety instantly without batteries or hassle.
| ASIN | B003OHDFSA |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 25,094 in DIY & Tools ( See Top 100 in DIY & Tools ) 25 in Circuit Testers |
| Colour | Blue |
| Customer Reviews | 4.7 4.7 out of 5 stars (695) |
| Date First Available | 29 May 2010 |
| Included components | 1 x Martindale Socket Tester |
| Item Package Quantity | 1 |
| Item Weight | 60 g |
| Item model number | CP501 |
| Manufacturer | Martindale Electric Co Ltd |
| Material | Abs |
| Measurement Accuracy | 50kohm |
| Measurement System | Metric |
| Number of Pieces | 1 |
| Part number | CP501 |
| Pattern | Three LEDs with fault codes |
| Power source type | Electric |
| Product Dimensions | 6.5 x 6.5 x 4.7 cm; 60 g |
| Style | Classic |
T**Y
Brilliant plug
This is a great item. The previous one from a different company didn’t work
B**N
A Classic Tester which works very well
Martindale testers have been around for decades, are simple to use and reliable. I quickly found out some of my sockets had live and neutral reversed - so much for professional installers!!
S**F
Does The Job But...
This will tell you if you have power or various combinations of crossed mains wires etc and works OK but I wish I had bought the version with the buzzer. With an audible warning if there is power to the socket I do not have to keep checking at the consumer unit. Apart from that it is handy, sturdy and small enough to have in your tool bag.
S**.
Handy tool
Handy to have in your tool box.
A**N
simple to use
This is simple to use ,but once you have checked the outlets in the house that will be the end of its usefulness You will then lend it out to someone else , after the second time it will be lost to you for good .
P**R
Classic, works as you'd expect
Does what it should, reliable & robust.
M**N
No problems to report
No problems to report, arrived quickly,good price,I find it reassuring to carry a quick check on a socket after fitting it
C**E
Does all you need it to.
Perfect for work as an electrician. Always bemuses me though the price for the sake of a buzzer compared to those without. Only reason it’s not 5 stars.
Trustpilot
4 days ago
1 month ago
